Q. Which one of the following is the true description about an animal concerned?
A) Earthworm – The alimentary canal consists of a sequence of pharynx, oesophagus, stomach, gizzard and intestine
B) Frog – Body is divisible into three regions : head, neck and trund
C) Rat – Left kidney is slightly higher in position than the right one
D) Cockroach – 10 pairs of spiracles (2 pairs on thorax and 8 pairs on abdomen)
Explanation
The respiratory system of cockroach consists of tracheae, tracheoles and spiracles. In cockroach, 10 pairs of spiracles are present on the lateral side of the body. Two pairs are in thoracic region and remaining eight pairs are in the abdominal region.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.